What do you think with the below Picture ?

You are given 16 witch hats. The hats are divided in four different colours – red, blue, green and yellow. Every colour has been assigned to four hats. Now each of the hat will be glued with a label of an arithmetic sign – ‘+’, ‘-‘, ‘x’ or ‘/’. But you can label one sign only once on one colour. In such an arrangement, the hats can be uniquely defined by its colour and symbol.

Can you arrange all the 16 hats in a 4x4 grid in a fashion that no two rows and columns have a repetition of colour or sign?
We have arranged four hats in the below picture to assist you.

What runs around the whole yard without moving?

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

Can you place three balls such that the equation shown in the picture holds true?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

what's the probability of getting a king or a queen from a pack of 52 cards?

If your uncle’s sister is not your aunt, what relation is she to you?

what does the below rebus mean?

What kind of band never plays music?